package bean;

import javax.servlet.ServletException;
import javax.servlet.annotation.MultipartConfig;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.Part;
import java.io.IOException;

@WebServlet(name = "ChangeImg")
@MultipartConfig(location = "C:\\Users\\asus\\Desktop\\student-login\\src\\main\\webapp\\img")// location改为本地的绝对路径
public class img_change extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        service(request,response);
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

    }

    protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        try {
            request.setCharacterEncoding("UTF-8");
            response.setContentType("text/html;charset=UTF-8");

            Part part = request.getPart("img");
            if (part == null) response.sendRedirect("interface.jsp");
            String fileName = part.getSubmittedFileName();

            part.write(fileName);

            String str = "img/" + fileName;
            User user = (User) request.getSession().getAttribute("user");
            user.setImg(str);
            request.getSession().setAttribute("user", user);   //将session里面的用户更换头像后存入

            function.UploadImg(user);    //新的用户信息写入文件

            response.sendRedirect("/interface.jsp");

        } catch (IOException e) {
            response.sendRedirect("interface.jsp");
        }

    }
}
